HMRC has confirmed that conveyancers who submit Stamp Duty Land Tax returns on behalf of clients will be required to register as tax advisers. The requirement, introduced through the Finance Bill 2025-26 currently passing through Parliament, comes into force on 18 May 2026 - with firms given three months to apply.
The announcement has drawn sharp criticism from across the legal profession. But regardless of the debate, the deadline is approaching and firms that fail to prepare risk being blocked from interacting with HMRC entirely.
Why HMRC Considers Conveyancers Tax Advisers
The reasoning is straightforward from HMRC's perspective. Filing a tax return for a taxpayer - including an SDLT return - is defined as tax advice under the new legislation. Since conveyancers routinely submit SDLT returns as part of the completion process, they fall within scope.
Critically, HMRC has stated that the requirement applies even if a firm does not view itself as a tax adviser, does not describe its work as tax advice, and even if helping people with their tax affairs is not the firm's main business function. The scope is deliberately broad.
This means that virtually every conveyancing firm in England and Northern Ireland that handles residential or commercial property transactions will need to register.
What Registration Involves
The government has invested £36 million in building the registration service. While full operational guidance was published in January 2026, the key requirements are now clear:
Who must register - Legal entities (firms) that submit SDLT returns or otherwise interact with HMRC on behalf of clients. This includes sole practitioners, small firms, and large practices alike.
Timeline - Registration opens on 18 May 2026. Firms have until 18 August 2026 to submit their application.
What HMRC will check - Registration is not a quality assessment of your advice. HMRC will not review qualifications or professional conduct. It is a minimum standards compliance check focused on ensuring accountability and transparency.
Outstanding uncertainty - HMRC has not yet fully clarified whether individual conveyancers must register in addition to their employing firms. This distinction matters for locums, consultants, and multi-office practices.
What Happens If You Do Not Register
The consequences of non-compliance are significant. Firms that fail to register by the deadline risk receiving a formal notice to cease providing tax advice - which in practice means being unable to submit SDLT returns on behalf of clients.
For a conveyancing firm, this would effectively halt completions. Without the ability to file SDLT returns, transactions cannot proceed to registration at the Land Registry. The operational impact would be immediate and severe.
HMRC has also indicated that compliance checks will follow the registration period, with potential penalties for firms that continue to interact with HMRC without being registered. In the worst case, a firm could face a permanent ban from the register.
Why the Industry Is Pushing Back
The reaction from professional bodies has been overwhelmingly negative. The Council for Licensed Conveyancers (CLC), the Law Society, and the Society of Licensed Conveyancers have all raised serious objections.
The CLC's Chair, Dame Janet Paraskeva, has urged the Treasury to reconsider, arguing that CLC-regulated conveyancers lack authority to provide tax guidance to clients. They function solely as agents completing and submitting SDLT documentation. The CLC has warned that registration could paradoxically increase misconduct risks by allowing bad actors to misrepresent themselves as qualified tax professionals.
The Society of Licensed Conveyancers has been equally direct, stating that licensed conveyancers are not tax advisers and are not permitted to provide tax advice.
Law Society President Mark Evans expressed frustration that despite assurances the government would consider the profession's concerns, no modifications were made to the legislation.
Key concerns across the industry include:
Regulatory duplication - Conveyancers are already regulated by the SRA or CLC, making additional HMRC registration redundant for activities where no problems have been identified.
Cost increases - Registration and associated compliance costs will likely be passed on to home buyers, increasing the cost of moving.
Professional indemnity insurance - Being labelled a tax adviser may trigger increased PI premiums, adding further cost pressure to firms.
Consumer confusion - Clients may wrongly believe their conveyancer is qualified to provide tax planning advice, creating unrealistic expectations.
Small firm impact - The administrative burden falls disproportionately on smaller practices with limited compliance resources.
The Bigger Problem: SDLT Complexity
Behind the registration debate lies a deeper issue. SDLT is a genuinely complex tax embedded within legal transactions. Conveyancers are routinely required to identify applicable reliefs, apply higher-rate rules for additional dwellings, calculate mixed-use apportionments, and navigate fact-specific exemptions.
These are not simple administrative tasks. HMRC regularly challenges SDLT positions submitted years after completion, and error rates across SDLT returns remain high across the sector. The gap between what conveyancers are expected to handle and what they are formally qualified to advise on has been widening for years. This registration requirement has brought that tension sharply into focus.
What Your Firm Should Do Now
Regardless of how the political debate unfolds, practical preparation is essential. The registration deadline is approaching and firms need to be ready.
Audit your SDLT processes - Document who in your firm makes SDLT decisions, what basis they use, and how complex cases are escalated. This audit trail will be important for registration compliance.
Verify your AML supervisory documentation - Registration requires evidence of anti-money laundering oversight. Ensure your records are current and accessible.
Identify all registering entities - If your firm operates multiple legal entities or offices, determine which need to register individually.
Resolve outstanding HMRC liabilities - Any unresolved issues with HMRC should be addressed before your registration application.
Consider specialist SDLT support - For complex transactions, engaging a dedicated SDLT advisory service can demonstrate qualified professional review and reduce risk. This is increasingly being seen as best practice rather than an optional extra.
Update client communications - Be transparent with clients about how SDLT assessments are handled and what level of tax advice your firm can and cannot provide.
The firms that take these steps now will be best positioned when the registration window opens in May. Those that wait risk a scramble that could disrupt live transactions at the worst possible time.
